#include "Zy_Tools.h"

#ifdef USING_CRC_TABLE
const uint16_t ccitt_table[256] =
{
    0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
    0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
    0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
    0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
    0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
    0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
    0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
    0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
    0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
    0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
    0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
    0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
    0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
    0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
    0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
    0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
    0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
    0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
    0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
    0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
    0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
    0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
    0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
    0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
    0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
    0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
    0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
    0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
    0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
    0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
    0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
    0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
};
uint16_t CRC16(unsigned char *q, int len)
{
    uint16_t crc = 0;

    while (len-- > 0)
        crc = (crc << 8) ^ ccitt_table[((crc >> 8) ^ *q++) & 0xff];
    return crc;
}
#else
uint16_t CRC16(unsigned char *q, int len)
{
    uint16_t crc;
    char i;

    crc = 0;
    while (--len >= 0)
    {
        crc = crc ^ (int) * q++ << 8;
        i = 8;
        do
        {
            if (crc & 0x8000)
                crc = crc << 1 ^ 0x1021;
            else
                crc = crc << 1;
        }
        while (--i);
    }

    return (crc);
}
#endif

uint16_t Calc_Interval(interval_t* in)
{
    //减去将要被替换掉的旧数据
    in->sum -= in->record[in->index];
    //写入新数据
    in->record[in->index] = HAL_GetTick() - in->lastTick;
    in->lastTick = HAL_GetTick();
    //加上新数据,计算平均值
    in->sum += in->record[in->index];
    in->avg = in->sum/RECORD_LEN;

    in->index++;
    if(in->index == RECORD_LEN)
    {
        in->index = 0;
    }
    return in->avg;
}

/*
 * 这个函数专为计算adc dma方式的平均值。
 * @param buf 存放数据的buf
 * @param chCount buf里一共存放了几个通道的数据
 * @param chIndex 要计算的通道在adc通道里的位置，从0开始
 * @param sampleCount 采样的数量，采样的数量需为2的幂加2.
 * @param shift 计算完之后移位数
 * @return 平均值
 */

uint16_t Calc_Adc_Average(uint16_t* buf,uint32_t chCount,uint32_t chIndex,uint32_t sampleCount,uint32_t shift)
{
    uint16_t maxValue = 0, minValue = 0xffff;
    uint32_t sumValue = 0;
    int curIndex = chIndex;
    for(int i=0;i<sampleCount;++i)
    {
        if(buf[curIndex] > maxValue)
        {
            maxValue = buf[curIndex];
        }
        if(buf[curIndex] < minValue)
        {
            minValue = buf[curIndex];
        }
        sumValue += buf[curIndex];
        curIndex += chCount;
    }
    sumValue -= maxValue;
    sumValue -= minValue;
    return sumValue>>shift;
}

/*
 * 将原始的字节数据转换成以空格分割的16进制数据
 * 源数据和目标缓冲区的长度需调用者保证
 * @param src 源数据
 * @param dst 存放hex数据
 * @param len 源数据的长度
 * @return >0,使用的dst的长度。<0,错误
 */
int Bytes_Hex(const uint8_t* src,uint8_t* dst,int32_t len)
{
    const uint8_t hexTable[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
    int32_t dstIndex = 0;
    int32_t srcLen = len;
    uint8_t a = 0;
    if(src == NULL || dst == NULL)
    {
        return -1;
    }

    for(int i=0;i<srcLen;++i)
    {
        a = *(src+i);
        dst[dstIndex++] = hexTable[(a>>4)&0x0F];
        dst[dstIndex++] = hexTable[a&0x0F];
        dst[dstIndex++] = ' ';
    }
    dst[dstIndex] = 0;
    return dstIndex;

}


